ICAO Annex 10 Vol 1 has the specs for ILS systems. Should be a link to the docs at the top of the flight deck forum.
The complete ILS system has markers in it, though these can be replaced by DME system. If the markers or DME are not available then the system is not complete/cannot be used.
However the may be a chance to use it as a NPA ie LOC only with different minima but that down procedure design and CAA